This object is the index string pointing into cefFESelectionTable, identifying which forwarding-element selection entry, the actual next-hop/adjacency/label set, CEF has chosen for this specific prefix. This is the link between this destination prefix and the specific set of forwarding actions CEF will apply to reach it, so following this index is exactly how an admin traces a prefix through to its actual adjacency, MPLS labels, or load-balancing group when debugging a forwarding path. Looking up a customer's /24 prefix in cefPrefixTable and following this object's value into cefFESelectionTable would reveal, for example, that traffic to that prefix is being load-balanced across two specific next-hop adjacencies.